Mechanisms of unexplained anemia in the nursing home.
D000368:Aged; D000369:Aged, 80 and over; D000740:Anemia / Q000209:etiology*; D018798:Anemia, Iron-Deficiency; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000150:complications; D008297:Male; D008875:Middle Aged; D009735:Nursing Homes; D011446:Prospective Studies